United Kingdom - Passport & Nationality - British Citizenship and Papua New Guinea
A birth in Papua New Guinea (or any of the territories that make up Papua New Guinea in the modern day) does not normally give rights to British nationality. However, where a parent, grandparent or great grandfather (on either side of the family) was born in the UK, Northern Ireland or the Republic of Ireland, it is possible to have claims to British or Irish citizenship in the modern day.
From 17.12.1920 until 12.12.1946, New Guinea was an Australian mandated territory in which the Crown exercised extra-territorial jurisdiction (known as ETJ). Between 13.12.1946 and 15.09.1975, it was an Australian Trust Territory in which the Crown exercised ETJ. From 16.09.1975 until 30.01.1980 (after independence), it was a foreign country known as Papua New Guinea. From 31.01.1980 until the present day, it was an independent Commonwealth country.
From 1888 until 1906, Papua was part of the Crown’s Dominions. Thereafter, it was part of Australia until it combined with New Guinea on 15.09.1975 to form Papua New Guinea. From 16.09.1975 until 30.01.1980 (after independence), it was a foreign country known as Papua New Guinea. From 31.01.1980 until the present day, it was an independent Commonwealth country.
Bougainville and Buka fell under New Guinea for British nationality purposes but now form part of modern day Papua New Guinea.
The most common routes to British nationality for those with a family member born in Australia are as follows: